he negotiated the louisiana purchase, which doubled the size of the united states of america in 1804. teddy roosevelt was the first american to win the nobel peace prize because he mediated the russo-japanese war in 1905. f.d.r.'s wartime diplomacy secured an alliance with churchill and stalin. that was critical in overcoming the axis of powers. president kennedy turned to diplomacy when the great majority of his advisors, in october, 1962, said use force. at the final moment president kennedy brokered a negotiated compromise with our greatest enemy, the soviet premiere nikita khrushchev, and that's how the cuban missile crisis ended and that's why we didn't incinerate hundreds of millions of people on the east coast and the midwest of the united states and in europe and in russia. because diplomacy, rather than force, triumphed. think of henry kissinger, still going strong at age 90, by the way. 40 years ago negotiated his brilliant opening to china that opened up relation that is have been frozen for the last 20 years prior and ensured a generation of peace between china and the uni